Решите уравнение t+2 11/15=7 5/39
T+2 11/15 = 7 5/39 t = 7 5/39 - 2 11/15 t = 7 25/195 - 2 429/195 t = 1390/195 - 533/195 t = 857/195 t = 4 77/195